Hello Zhina,
I'll try to be clear enough.
1. You have created the folder opentelemac-mascaret with the pre-requisites automatic-installation.
2. Paste the folder v7p2r0 that you downloaded from the svn repository into opentelemac-mascaret folder.
3. Create a text file, rename it and change its extension as "systel_v7p2r0.cfg", copy into this file the info that is in the following link:
wiki.opentelemac.org/doku.php?id=configuration_file. Now you have the info into the file systel_v7p2r0.cfg, you have to change the following info
root: C:\opentelemac-mascaret\v7p0
version: v7p0
language: 2
modules: system -dredgesim
To
root: C:\opentelemac-mascaret\v7p2r0
version: v7p2r0
language: 2
modules: system
And save the file into the folder "configs" located in the path C:\opentelemac-mascaret\v7p0\configs.
Once you have done the above mentioned, do steps 4 to 7 as mentioned for the manual procedure description.
Remember to change v7p0 in the paths for v7p2r0.
Well, that's basically how it must be done.
Answering your question, indeed, it is necessary to put the files you downloaded (folder v7p2r0) into the folder opentelemac-mascaret created by the automatic installation.
I hope it helps.
Cheers,
José Andrés.